SpatialDataSource d = (SpatialDataSource)
ds.getDataSource("spatialobjectpersona",
DataSourceFactory.UNDOABLE);
d.beginTrans();
d.buildIndex();
Set set1 = getValuesSet(d);
d.setFieldValue(0, 1, ValueFactory.createValue(10));
Set set2 = getValuesSet(d);
d.setFieldValue(0, 1, ValueFactory.createValue(12));
Set set3 = getValuesSet(d);